IPV6_FLOWLABEL_MASK   98 netinet/ip6.h  #define IPV6_FLOWLABEL_MASK	0x000fffff	/* flow label (20 bits) */
IPV6_FLOWLABEL_MASK  102 netinet/ip6.h  #define IPV6_FLOWLABEL_MASK	0xffff0f00	/* flow label (20 bits) */